Interesting, well I guess DNA results and phenotype don't always necessarily match up. Phenotype is only one aspect of inheritance, although since DNA inheritance is random and siblings' DNA can vary as a result, I've always thought there was perhaps some correlation between phenotype and the DNA that is inherited, but maybe not. For instance, I feel that my DNA results also roughly reflect how I look, and many others agree regarding them and their own results.

Anyway, I don't know what you mean by Mexican-looking though, since that can mean anything from Spanish/European, Native American, or "mestizo" (Spanish/Native American mix). I can definitely see the Spanish/Iberian influence in many Mexicans, as well as Native American.